August 5, 2020

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COVID-19 by the numbers

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The Winnipeg Free Press is tracking the number and results of COVID-19 testing in Manitoba, as reported daily by the provincial government.

Chart showing daily cumulative counts of positive COVID-19 cases


Chart showing new daily cases and seven-day moving average


Chart showing new daily cases and seven-day moving average


 

Chart showing Manitoba's reported COVID-19 cases by age and gender


Proportion of positive tests

The percentage of tests that are positive, referred to as the test positive proportion by the province, shows the infection rate among those tested for the virus. Despite looking noisy and erratic, the value remains below two per cent. 

Chart showing the cumulative percentage of tested individuals with COVID-19


Rates across Canada 

Another important statistic is per capita value, which helps compare something among groups of different sizes. Generally speaking, more populous provinces will have more tests, positive cases and deaths, simply because there are more people.  To effectively compare provinces with different populations, we determine how many tests, cases and deaths there are for each person in the province.  Per-capita data is usually reported per 100,000 people to avoid using tiny decimal values.

Comparison of COVID-19 testing per capita across the provinces


Comparison of COVID-19 cases per capita across the provinces


Comparison of COVID-19 deaths per capita across the provinces


The growth of COVID-19

Tracking the growth of reported COVID-19 cases in Canada, from the fiftieth case onward, illustrates possible trajectories based on other provinces that are further along the COVID-19 timeline. Manitoba, along with other less populated provinces, follows a gentler curve. 

This chart uses a logarithmic, also known as a log, scale on the y-axis to plot case counts for each province.

Logarithmic scales, which are exponential as opposed to linear, are useful for displaying and analyzing data that covers a wide range of values. Using a log scale allows the chart to show both the low 100s in  New Brunswick and the high 14,000s in Quebec without minimizing or downplaying either extreme. 

Beyond COVID-19, logarithmic scales are used to measure the magnitude of earthquakes and the intensity of sound.

Chart showing growth curves for days since the 50th reported cases of COVID-19 in applicable provinces and territories

History

Updated on Friday, July 10, 2020 at 12:51 PM CDT: Updates daily testing chart to include seven day moving average

July 21, 2020 at 3:23 PM: Updates charts.

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